Stereopticon lantern-slide-feed device



Jan; 15 1924. 1,481,201

c. N. HEADDING ET AL STEREOPTICON LANTERN SLIDE FEED DEVICE I Filed Jan. 15. 1922 s Sheets-Sheet 1 allow: 0;

Jan. 15,

- 1,481,201 C. N. HEADDING ET AL STEREOPT'ICON LANTERN SLIDE FEED DEVICE Filea Jan. 13. 1922 3 Sheets-Sheet Z J21 V627 Z07 3, i il jfeaddz'iz g Jan. 15, 1924. 1,481,201

c. N. HEADDING ET AL STEREOPTICON LANTERN SLIDE FEED DEVICE 7; Filed Jan. 13. 1922 3 Sheets-Shay s I Z I 1 1:7 .12 E2 13. j

Everi ors. LY 1f fleadciz'izg dlbrnay,

Patent Jan. 15, 1924.

FATENT CLAY NORRIS EEADDING AND FRANCIS MITCHEL KENT, F CHEHALIS, WASHINGTON.

STEREOPTICON LANTERDIFSLIDE-FEED DEVICE. I

Application filed January 13, 1922. Serial No. 528,920.

To all whom it may concern:

Be it known that we, CLAY NORRIS-HEAD- DING and F RANCIS MITOHEL KENT, citizens of the United States, residing at Chehahs,

in the county of Lewis and Stateof VVashington, have invented new and useful Improvements in Stereopticon Lantern-Slide- Feed Devices, of which the following is a specification.

This invention relates to lmprovements in stereopticon lantern slide feed devices.

The principal object of this invention is.

to produce means for automatically changing the lantern slides into and out of the optical system of a stereopticon machine.

Another object of this invention is to produce a device of this character which is entirely automatic and which may be run continuously as for unattended advertising displays. I V

' A further object of this invention is to produce a device of this character which may be used in connection with stereopticons now upon the market without materially altering the construction of the same.

Another'object is to produce a machine which is simple in construction and one which will not easily become dis-arranged.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a side elevation of my device,

Fig. 2 is a top plan view,

Fig. 3 is a cross-section taken on the line 33 of Figure 1,

Fig. at is a cross-section taken on the line 1-4 of Figure 2,

Fig. 5 is a fragmentary detail view of a slide replacing contact.

Fig. 6 is an enlarged detail view driving mechanism,

Fig. 7 is an endelevation of the driving mechanism,

Fig. 8 is a topplan view of'the driving mechanism,

Fig. 9 is a fragmentary detail view showing the operation of the magazine changing of the cam.

Fig. 10 is a fragmentary perspective view of the latch mechanism,

Fig. 12' is an enlarged detail. view of the magazine operating mechanism,

Fig. 13 is a View similar to 12,but with amechanism in a released position,

Fig-.14 is a fragmentary detail view taken on thelin'e 1 1 1 of Figure 12,

Fig. 15 is a fragmentary perspective view of the magazine engaging member, and

Fig. 16 is a perspective view of a stop member. 7

In the accompanying'drawings wherein for the purpose of illustration is shown a preferred embodiment of our invention, the numerals refer to corresponding parts. in the severalviews.

In the changing of stereopticonviews, it is'necessary to move one slide out of the optical system of thefstereoptic'on' machine and to then move'into the optical path a new slide, and-it is to accomplish this without manual effort that we have devised this invention. I

T'WVe proposeto accomplish this feature by employing continuously driven cams, which .will move the slide into the optical system,

hold the same there for a given period of time, then move the slide out of the optical system and move a new slide back into the optical system, repeating this cycle at given intervals. V

Thisfwe accomplish by employing a base 5, upon which is mounted a stand 6, carrying operating mechanismto be hereinafter described, and the magazine 7, which magazine is mounted adjacent the stereopticon herein designated as a whole by the numeral 8. The magazine 7 is circular in form and is provided with a series of upstanding partitions 9 and 11 between which'the lantern slides are adapted to be retained. The magazine is also provided on its under surface witha series of pins 12, which serve as a medium for rotating the magazine, as will be later described.

A. track 13 is provided, as is best shown in Figure 3. This track has parallel guides 14 and 16 mounted there-above, which serve to steady the slide as shown at 17 The numeral l8 designates a rod which is adapted to" slide above the guides 14 and 16 and has its free end movable in a support 19, as shown at 21. This rod carries pushers '22 and23, the pusher 22 extending down and entering the track 13 while the pusher 23 merely engages the upper portion of the slide 17. This rod 18 is pivoted as at 2 1 to a link 25, which is in turn pivoted as at 26 to a rocking arm 27, which rocking arm is rigidly secured to a shaft 28 journaled in uprights 29 and 30.

A segment 31 is attached to the rocking arm 27 as is best shown in Figures 1 and 6, while a catch 32 is secured on a shaft 33 and has its freeeend in line with the free end of the segment 31. A bell crank 34: is rigidly secured to the shaft 33 and carries an adjusting screw 36 on its free end, which adjusting screw is adapted to lie within the path of a pin 37 carried upon a ratchet wheel 38'rotatably secured to the upright 30.

Thenumeral 39 designates a. spring-pawl adapted to prevent retrograde movement of the ratchet 38, which ratchet is rotated through contact with a member 41 pivoted at a2 and actuated by a link 43, the link in turn being connected *ith an eccentric pin 4A mounted upon the end of theshaft' 4:6.

This shaft is journaled in the uprights 29 and and carries a gear 47 which meshes with a continuously rotating worm gear l8 mounted upon the shaft to which is journaled in the bearings 50 and 01, which are in turn mounted upon the base 5 As shown to advantage in Fig. 8 a pulley 52 is rigidly secured to the shaft 49 and serves as a medium for rotating the same Power may, however, be applied in any other convenient manner.

It will be observed that the shaft 16 carries a cam 53which is mounted between the uprights 29 and 30 and is adapted to contact witha roller 5d carried upon the rocking arm 27. A cam 56 is also mounted upon the shaft e6, but at a point outside of the uprights and in close proximity thereto. This cam is adapted to contact a roller 57 mounted upon the lever 58, which lever is freely rotatable on the shaft 28. A spring 59 is connected to this lever and has its opposite end connected to the base 5, as shown at 61.

A stop-lever 62 is rigidly secured to the shaft 28 and has a stop 63, which contacts the lever 58, as best shown in Figure 11.

The numeral 64 designates a spring secured to this stop-lever and is likewise attached to the base as'at 61, while a link 66 is connected to the lever 58 and extends to a point adjacent the periphery of themagazine, as is best shown in Figures 1 and 2, The numeral 67 refers to a rocking arm mounted upon the magazine pivot 67 and adapted to pivot there-about.

Thislever carries at its free end a stud 68, upon which is mounted a rocker 69 having stops 71 and 72 formed thereon. These stops are adaptedto contact opposite sides of the vlever6'Twhen the same is rocked through the medium of its connection, as shownat ,73, to the rod 66. r

A catch 7a is mounted upon the rocker 69 and is provided with a slotted portion 76,

which is adapted to engage pins 12 carried upon the bottom of the magazine 7.

In order to prevent retrograde movement of the magazine, we provide a pivoted stop 77, which is mounted upon a pin 78 and has an arm 79 extending therefrom, which is adapted to contact pins 81 and 82, while a spring 83 is coiled about the base of the stop 77 so as to hold the arm 79 against the pin 82.

A lug S4; is formed upon the upper part of the stop, as illustrated to advantage in Figure 16.

Our device operates as follows Presuming that the device has been attached to a lantern and that the magazine has been filled with slides, the'power will be applied, which will cause the shaft 49 to rotate, transmitting motion through the worm gear to the shaft 16. This will cause the cams 53 and 56 to rotate, but as the segment 31 is being held in the position shown in Figure l, the cams and 56 will not contact with their respective rollers until the device has made twelve complete revolutions or until the link d2 has transmitted twelve impulses to the ratchet 38, thus bringing the pin 37 into contact with theadjustable stop 36, which will raise the bell crank 34: and lift the latch 32. This action will allow the springs 59 and 6st to function, with the result that the rods 18 and 66 will move toward the right of the drawing in Figure The movement of the rod 18 will move the slide into its respective compartment in the magazine, and the rod 18 will stay in this position for a limited time, during which the magazine will move a given distance.

The cam will then again contact the roller and will return the rod 13 to its normal position moving anew slide into position in front of the projector. As soon as the return movement has taken place the latch 32 will again function and hold these parts in that position. During this period, the following action will have taken place: When the rod 66 moves forward, due to the action of the spring 6i, the latch Tl will engage the pin 12 which is acent its slot 76 and will move to the position shown in Figure 12. The rod will now be returned to its normal position through the action of the cam 56 bearing against the roller 57. This return movement will cause the latch 74 to move from the position shown in Figure 12 out of contact with the pin 12 and thus allow the rod 66 to return to its normal position as shown in Figure 13. At the same time, the pin 12, in passing the lug 84:, will cause the same to rotate upon its pivot 7 8 so as to allow the passage of the pin and immediately spring into its normal position, to prevent retrograde movement as before mentioned.

It is understood that the magazine-changing movement takes place during the time that the slide-changing mechanism is in its position to receive a new slide. Should a slide be only partly returned to its compartment, it will be pushed entirely therein by a wiper 85, the action oi which is well-known and needs no further description.

From the foregoing description taken in connection with the accompanying drawing, iL will be manifest that we have devised a stereopticon lantern feed slide device, which is comparatively simple in construction, economical to manufacture and which will automatically change lantern slides into and out or the optical system of a stereopticon machine in a minimum amount of time.

It is to be understood that the form 0]": our invention herewith shown and described is to be taken as preferred example 01- the same, and that various change in the shape, size and arrangement of parts may be resorted to without departing irom the spirit of the invention or the scope oi the subjoined claims.

Having thus described our invention, we claim 1. In a projecting mechanism, the combination of a projector, gearing mounted adjacent said projector, cams rotated by said gearing, a rocker arm actuated'by one or" said cams, means for holding said rocker arm out of the path of movement of said cam, means for moving said rocker arm into the path of said cam at pre-determined in tervals, a slide-holding magazine adjacent said projector, and means associated with said rocker for moving slides into and out of said magazine.

2. In a projecting mechanism, the combi nation of a projector, gearing mounted adjacent said projector, cams rotated by said gearing, a rocker arm actuated by one of said cams, means for holding said rocker arm out of the path of movement of said cam, means for moving said rocker arm into the path of said cam at pie-determined intervals, a slide-holding magazine adjacent said projector, means associatedwith said rocker arm for moving slides into and out of said magazine, and means associated with one of said cams for intermittently rotating said magazine.

3. In a projecting mechanism, the combination of a projector, gearing mounted adjacent said projector, cams rotated by said gearing, a rocker arm pivoted adjacent said gearing, and adapted to be moved by one 01": said cams, a segment secured to said rocker arm, a latch adapted to engage said segment for the purpose of holding said rocker arm out of engagement with said cam, means for moving said latch out of engagement with said segment at predetermined intervals, a slide holding magazine mounted adjacent said projector, and means for moving slides into and out of said magazine through the movement of said rocker arm.

a. In a projecting mechanism, the combination of a projector, a slide holding magazine mounted adjacent said projector, means for moving slides into and out of said maga zine, said means comprising a reciprocating lever, a rocker arm pivoted to said lever,

cam adapted to actuate said rocker arm, a segment secured to said rocker arm, a latch adapted to engage said segment for the pur pose of temporarily holding said rocker arm out or" the path 01 said cam and ratchet means for intermittently releasing said latch, substantially as and for the purpose described.

5. In a projecting mechanism, the combination of a projector, gearing mounted adjacent said projector and adapted to be continuously rotated, cams secured thereto, a rocker arm adapted to be moved by one of said cams, a lever adapted to be moved by the other of said cams, said cams being oilset with respect to each other for the purpose of timing the movement or said rocker arm with respect to said lever, a segment secured to said rocker arm, a pivoted latch adapted to engage said segment for the purpose of holding said rocker arm out of the path of said earn, a rotatable slide holding magazine mounted adjacent said projector, said magazine being capable of maintaining a series of slides radially disposed in a vertical position therein, a reciprocating rod pivoted to said rocker arm and adapted to move the slides into and out of said magazine, and means for intermittently rotating said magazine a predetermined distance dur ing each reciprocation or" said reciprocating rod.

In testimony whereof we afix our signatures.

CLAY NORRIS HEADDING. FRANCIS MITGHEL KENT. 

